 (USA).bin/APPS/Hyperhtm/HHDRVS/SEANDX/SEADRVS/32550WC1.JPG)
| Manufacturer: Seagate | Model: ST32550WC | TD# 270208 |
| Interface.. Fast Wide SCSI-2 SCA | Formatted Capacity.. 2,147 MB |
| Cylinders | 3510 | Heads | 11 | Sectors | Variable |
| Landing Zone | Max Cyl | Precomp | N/A | RWC Cyl | N/A |
| Encoding Method | RLL 1,7 | Xfer/Mb(async/sync) | 10/20 | MTBF (Hr X 1000) | 800 |
| Form factor | 3.5" | Novell Y/N | Y | Height | 0.7" |
| Power (Typical) | 8.8W | Power (Max) | N/A | Speed | 7200 |
| Avg seek (ms) | 9 | Cache | 512k | Mfg. Warranty | 5 YRS |
Copyright ⌐ 1996, 1997 Tech Data Corporation
Configuration and Jumper Options
On the ST32550WC drive the SCSI ID is normally set over the SCSI bus by the host system using connector contacts 39 (ID 0), 40 (ID 2), 79 (ID 1), and 80 (ID 3). Systems designers may, optionally, install a remote operator panel connection to set the SCSI ID. The figure below illustrates the SCSI ID pins used for this purpose.
| SCSI ID | ID 0 Pins1-2 | ID 1 Pins3-4 | ID 2 Pins5-6 | ID 3 Pins7-8 |
| 0 | Out/open | Out/open | Out/open | Out/open |
| 1 | In/Ground | Out/open | Out/open | Out/open |
| 2 | Out/open | In/Ground | Out/open | Out/open |
| 3 | In/Ground | In/Ground | Out/open | Out/open |
| 4 | Out/open | Out/open | In/Ground | Out/open |
| 5 | In/Ground | Out/open | In/Ground | Out/open |
| 6 | Out/open | In/Ground | In/Ground | Out/open |
| 7 | In/Ground | In/Ground | In/Ground | Out/open |
| 8 | Out/open | Out/open | Out/open | In/Ground |
| 9 | In/Ground | Out/open | Out/open | In/Ground |
| 10 | Out/open | In/Ground | Out/open | In/Ground |
| 11 | In/Ground | In/Ground | Out/open | In/Ground |
| 12 | Out/open | Out/open | In/Ground | In/Ground |
| 13 | In/Ground | Out/open | In/Ground | In/Ground |
| 14 | Out/open | In/Ground | In/Ground | In/Ground |
| 15 | In/Ground | In/Ground | In/Ground | In/Ground |
ST32550WD drives do not have internal terminators or any other way of adding internal termination to the drive. You must provide external active termination (ANSI SCSI-2 Alternative 2) to these drives when termination is required.
NOTE: Use active terminators when terminating the bus.
Spindle synchronization for WC drives is normally handled on the SCSI bus by the host system using connector contact 37 for the spindle sync reference signal. System designers may, optionally, install a spindle sync cable using pin 6 on the J4 connector to provide +SSREF. See drawing on page 1.
Several other jumper options are available as illustrated below.
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